Malicious PDF — malware analysis report

Static analysis result for SHA-256 4faaf06e6fc73b9e…

MALICIOUS

PDF

75.8 KB Created: 2021-03-18 21:59:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 1dbe834aa9ec6306c754a5e2bf856fcf SHA-1: b1db8769a5876293bbf51b1c966cf69d365ca9cb SHA-256: 4faaf06e6fc73b9e001eb400bc81fb499099c4d43aaecced63ed38c44ee574de
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://dugedepap.ru/strik?utm_term=garmin+forerunner+920xt+hrm-run PDF link annotation
    • http://dixefez.iblogger.org/86961045222.pdfIn PDF document text
    • https://cdn.sqhk.co/tinolaseja/gcgggiA/pick_me_up_songs.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421629/normal_601f3098e0a98.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379601/normal_602187b7ba5bf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490370/normal_5fd075d5d74d6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489240/normal_5fe3c1183d6d1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499635/normal_601f685e39b20.pdfIn PDF document text
    • https://cdn.sqhk.co/zefafulolit/mjgv43L/build_city_games_online_free.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377647/normal_60068f1e5c734.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4527042/normal_5ffddeedc9902.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459785/normal_60418cceaba21.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://4461694d-a6f7-4a69-895a-ff5ddeb3c622.filesusr.com/ugd/f504fb_ca3767bf37b540b8bff76beb740996bf.pdf?index=trueIn PDF document text
    • https://38aad9b5-7a72-45b8-ac81-9fe73ce82000.filesusr.com/ugd/08338c_6edd3fa24a55469981059ec94a08656d.pdf?index=trueIn PDF document text
    • http://dokaginiw.epizy.com/malaysia_2018_international_religious_freedom_report.pdfIn PDF document text
    • http://xelidamos.epizy.com/dads_worksheets_sudoku.pdfIn PDF document text
    • https://44eeb0f0-4dc9-4d8b-b3fd-cc7ace98e90e.filesusr.com/ugd/a083a1_8667ba5c148646a1935a073d478827c0.pdf?index=trueIn PDF document text
    • https://8e12fe21-47c1-448c-af9e-883e7c84523b.filesusr.com/ugd/52ac5e_a589926b6c1947388967102bdbf5d02b.pdf?index=trueIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e73a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE73A 5360 bytes
SHA-256: fe25189a966f125b1204ba84b797ba44968842c4b859147371bb2df314e47c47
font_01_sfnt_off0000f959.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF959 11584 bytes
SHA-256: 536364b5ece8f6d4faf37b44d93f41d3dd757d5fe52be07aba5f8cf0b52cdaef

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